College Algebra / Alg 046 · Atom · ~20 seconds
The Split-Sum Error
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The split-sum error distributes a radical over addition; roots split over products only, and √(a + b) is not √a + √b.
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√(9 + 16) is √25 = 5, while √9 + √16 is 3 + 4 = 7. The split changes the answer.
Watch for
The same trap waits inside √(a² + b²).
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